JPH0871885A - Chip sucking device - Google Patents

Abstract

PURPOSE: To always sufficiently remove a chip in a cover, and eliminate deformation in the cover even when a device is formed of flexible material. CONSTITUTION: This device is provided with a cylindrical cover 26 supported at one end side by a machine main body or a cutter 11, extended so as to enclose the periphery of the extended part 25 of the cutter 11, elastically formed so that a tip part on another end side can be moved along the axis direction of the cutter 11, and moreover provided with a suction port 37 for communicating the inside and the outside; and a sucking means 27 linked to the suction port 37 to suck air from the inside of the cover 26. An air take-in path 51 for always communicating between the inside and the outside is provided on the cover 26.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chip suction device provided in a cutting machine for sucking and removing chips while preventing them from scattering.

[0002]

2. Description of the Related Art Generally, a cutting machine is configured to have a machine body and a cutter which is attached to the machine body and is rotationally driven and has a cutting edge portion at a protruding tip end portion thereof. Some of them are provided with a chip suction device for preventing chips from scattering and sucking and removing them. The chip suction device is supported by the cutting machine main body or the cutter at one end side, extends so as to surround the cutting edge portion, and the tip end on the other end side is expandable and contractable so as to move along the axial direction of the cutter. It has a cylindrical cover provided with a suction port for communicating the inside and the outside, and a suction unit that is connected to the suction port and sucks air from the inside of the cover. While preventing the generated chips from scattering by the cover, the chips in the cover are discharged to the outside together with the air sucked by the suction means.

[0003]

In the above-described chip suction device, when the cylindrical cover comes into contact with the work at the entire circumference of its tip, a state occurs in which air is not sufficiently taken into the cover. However, there is a problem in that the air cannot be sufficiently sucked by the suction means, and thus the chips cannot be sufficiently removed. Further, when the cover is made of a flexible material, there is a problem that the cover may be deformed if air is not sufficiently taken into the cover.

Therefore, an object of the present invention is to prevent the occurrence of a state in which air is not sufficiently taken into the cover, so that the chips in the cover can be sufficiently removed at all times, and the cover is flexible. It is an object of the present invention to provide a chip suction device that does not deform the cover even when it is formed of a conductive material.

[0005]

In order to achieve the above object, a chip suction device of the present invention is provided with a machine body, a machine body attached to the machine body, rotationally driven, and extending in a direction opposite to the machine body. It is provided in a cutting machine having a cutter having a cutting edge portion provided at the tip of the extending portion, is supported on one end side by the machine body or the cutter, and extends so as to surround the extending portion. , A cylindrical cover having a distal end on the other end side that is expandable and contractable so as to move along the axial direction of the cutter, and further provided with a suction port for communicating the inside and outside, and is connected to the suction port, and inside the cover. And a suction means for sucking air from the inside, wherein the cover is provided with an air intake passage for always communicating the inside and outside.

[0006]

According to the chip suction device of the present invention, even when the cylindrical cover comes into contact with the work at the entire circumference of the tip end thereof, the air intake passage provided in the cover for constantly communicating the inside and outside is provided. Sufficient air is taken into the cover through the cover.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A chip suction device according to a first embodiment of the present invention will be described with reference to FIG. In FIG. 1, reference numeral 11 indicates a cutter, and reference numeral 12 indicates the chip suction device of the first embodiment attached to the cutter 11. In the first embodiment,
The cutter 11 includes a cutter body 13 and an arbor 14 (shown by a chain double-dashed line in FIG. 1) that detachably holds the cutter body 13. The cutter body 13 has a shank portion 15 held by the arbor 14, It comprises a shank portion 15 and a main portion 17 having a tapered stepwise shape and a cutting edge portion 16 formed at the tip.

The arbor 14 has a tapered shank portion 19 detachably held by a rotating head of a cutting machine body (not shown), a flange portion 20 provided on the large diameter side of the shank portion 19, and Shank part 1 of flange part 20
9 has an arbor main body 22 having a cylindrical holding portion 21 provided on the opposite side, and an oil supply member 23 provided on the outer peripheral portion of the holding portion 21 so as to be rotatable relative to the arbor main body 22. are doing. Then, in the holding unit 21,
The shank portion 15 of the inserted cutter body 13 is held, and the portion of the cutter body 13 protruding from the arbor 14 is an extension portion 25 extending in the opposite direction to the machine body. Here, the refueling member 23 is
It is for connecting to a non-rotating part of a cutting machine main body (not shown) so that the cutting oil supplied from the cutting machine main body is caused to flow through the holding part 21 to the cutter 11 for internal oil supply.

The chip suction device 12 includes a cylindrical cover 26 supported at one end by the holding portion 21 of the arbor 14,
It has suction means 27 for sucking air from the inside of the cover 26. The cover 26 has a substantially cylindrical mounting member 29 that fits the holding portion 21 of the arbor 14 to the inner peripheral portion and is fixed to the holding portion 21 with a screw member 28, and the mounting member 2
Bearing 30 for fitting 9 to the inner peripheral side, and substantially cylindrical cylindrical member 31 for fitting this bearing 30 to the inner peripheral side
And a circular plate-shaped disc member 32 attached to the opposite side of the cylindrical member 31 with respect to the arbor 14, and extends so as to surround the cutter body 13 to form a circular plate. A substantially cylindrical base member 33 attached to the opposite side of the cylindrical member 31 of the member 32, and a tubular expandable member 34 attached to the opposite side of the cylindrical member 31 of the base member 33.
And have.

The cylindrical member 31 is connected and fixed to the non-rotating refueling member 23 of the arbor 14 via the first connecting member 35 and the second connecting member 36, whereby the rotation is restricted. The base member 33 is made of steel or the like,
One end side is attached to the disc member 32 in a state of being closed by the disc member 32, the attachment member 29, the holding portion 21 of the arbor 14 and the shank portion 15 of the cutter body 13,
A suction port 37 that communicates the inside and the outside is provided in the middle portion along the radial direction. The other end of the base member 33 is
It is fixed by a fixing member 38 in a state of being fitted to the inner peripheral portion on one end side of the elastic member 34.

A suction means 27 is attached to the suction port 37 of the base member 33. This suction means 27 is
It has an outer cylinder part 39 attached to the suction port 37, an inner cylinder part 40 fitted inside thereof, and a compressed air supply source 41 for supplying compressed air, and the compressed air supply source 41 is the outer cylinder part. It is connected to the introduction hole 42 of 39. Then, when air is introduced from the compressed air supply source 41 into the introduction hole 42 of the outer tubular portion 39, the inside of the inner tubular portion 40 is formed due to the shape of the flow path formed by the inner tubular portion 40 and the outer tubular portion 39. An airflow is generated in the direction away from the suction port 37. As a result, the air in the base member 33 and the elastic member 34 is sucked from the suction port 37 and discharged to the outside.

The expansion / contraction member 34 is coaxial with the cutter body 13, and has an annular small-diameter portion 43 and an annular large-diameter portion 44 having a larger diameter than that of the cutter main body 13 connected by a tapered surface portion 45 and arranged alternately. A member main body 46 formed of an elastic material so as to have a so-called bellows shape, and a reinforcing member 47 made of a ring-shaped spring steel material or the like fitted to the inner peripheral sides of all the large diameter portions 44 of the member main body 46. And have. Elastic member 34
The small diameter portion 43 at the tip is extendable and contractable so as to move along the axial direction of the cutter body 13, and is perpendicular to the axial line of the cutter body 13. In addition, in a portion surrounded by the disc member 32, the cylindrical member 31, and the mounting member 29, a seal member 48 for preventing cutting oil and the like from reaching the bearing 30, and a holding member 4 for holding the seal member 48.
9, 50 are arranged. Further, the reinforcing member 47 of the elastic member 34 can be appropriately omitted.

In the first embodiment, the tapered surface portion 45 between the small-diameter portion 43 and the large-diameter portion 44 at the most tip is
A plurality of through holes 51 as air intake passages that penetrate the inside and the outside of the cover 26 are arranged in the circumferential direction. According to the chip suction device 12 of the first embodiment having such a configuration, when the cutter body 13 comes into contact with the work 52 and the cutting is started by the cutting blade portion 16, the small diameter portion 43 at the tip of the cover 26 contacts the work 52. Contact. Then, as the cutting by the cutter body 13 progresses, the elastic member 34 of the cover 26 elastically deforms and follows the cover 26. In this way, the scattering of chips generated by cutting by the cutting blade portion 16 of the cutter body 13 is prevented by the cover 26 that covers the surroundings.
On the other hand, at the start of cutting, compressed air is introduced from the compressed air supply source 41 of the suction means 27 into the introduction hole 42 of the outer tubular portion 39, and an air flow is generated in the inner tubular portion 40 in a direction away from the suction port 37. . As a result, air flows from the tip opening of the cover 26 through the inside of the cover 26 to the suction port 37, and the suction port 37.
The air in the cover 26 is discharged to the outside together with the chips.

At this time, even when the work 52 is brought into contact with the entire circumference of the small-diameter portion 43 at the tip, the inside of the cover 26 is sufficiently provided through the through-hole 51 provided in the cover 26 for always communicating the inside and the outside. Air will be taken in. Therefore, it is possible to prevent a situation where the air is not sufficiently taken into the cover 26, and the cover 26 is constantly provided.
The chips inside can be sufficiently removed, and the shape of the elastic member 34 made of an elastic material, that is, a flexible material can be maintained well.

Next, a chip suction device according to a second embodiment of the present invention will be described with reference to FIG. In FIG. 2, reference numeral 53 is a cutter, and reference numeral 54 is a chip suction device of the second embodiment attached to the cutter 53. Also in the second embodiment, the cutter 53 includes a cutter main body 55 and an arbor (not shown) that detachably holds the cutter main body 55.
The cutter body 55 has a shank portion 5 held by the arbor.
6 and a main portion 58 having a cutting edge portion 57 formed at the tip. The portion of the cutter body 55 that projects from the arbor is an extension portion that extends in the opposite direction to the machine body. Here, as the arbor, for example, a side lock type arbor is adopted.

The chip suction device 54 has a cylindrical cover 59 supported at one end by the shank portion 56 of the cutter body 55, and a suction means 6 for sucking air from the cover 59.
0. The cover 59 includes a substantially cylindrical mounting member 62 that fits the shank portion 56 of the cutter body 55 to the inner peripheral portion and is fixed to the cutter body 55 with a screw member 61, and the mounting member 62 on the inner peripheral side. It has a bearing 63 to be fitted and a substantially cylindrical cylindrical member 64 to which the bearing 63 is fitted on the inner peripheral side, and extends so as to surround the cutter main body 55 to form a cylindrical member 64. Has a substantially cylindrical base member 65 and a cylindrical sliding member 66 mounted on the opposite side of the base member 65 to the cylindrical member 64. In addition, retaining members 67 and 68 for retaining the bearing 63 are fixed to the mounting member 62 and the cylindrical member 64, respectively.

The base member 65 is made of steel or the like, and has one end closed with the cylindrical member 64, the mounting member 62 and the shank portion 56 of the cutter body 55.
4, the suction port 69 for communicating the inside and the outside is provided in the middle portion along the radial direction. A step portion 70 is formed in the center of the outer peripheral portion of the base member 65 by having a large diameter on the side of the cylindrical member 64 including the suction port 69 and a small diameter on the opposite side.

A connecting pipe 71 is attached to the suction port 69 of the base member 65, and a suction means 60 such as a negative pressure source for sucking air is connected to the connecting pipe 71. By the suction operation of the suction means 60, the air in the base member 65, that is, the cover 59 is sucked from the suction port 69 and is discharged to the outside via the connecting pipe 71.

The sliding member 66 is coaxial with the cutter body 55 and is made of steel or the like and is fitted to the inner peripheral portion of the base member 65 on the small diameter side so as to be slidable along the axial direction. The member main body 72 and the cutter main body 55 at the tip thereof.
It is provided between a flange member 73 made of steel or the like that is perpendicular to and fixed in a flange shape, and the flange portion 73 and the stepped portion 70 of the base member 65, and urges them in a direction away from each other. And a spring 74. Here, in the member main body 72, a groove portion 75 along the axial direction is formed on the outer peripheral surface, and the pin 7 screwed from the base member 65.
Since the pin 6 is guided in the groove 75 by the protrusion of 6 into the groove 75, the sliding range of the sliding member 66 with respect to the base member 65 is determined. The movement of the sliding member 66 with respect to the base member 65 causes the cover 59 to expand and contract.

Further, in the second embodiment, a plurality of air grooves 77 as air intake passages are formed in the front end surface of the flange member 73 in the circumferential direction so as to be recessed one step from the front end surface and penetrate the inside and outside of the cover. It is formed radially. According to the chip suction device 54 of the second embodiment having such a configuration, when the cutter body 55 contacts the work 78 and the cutting is started by the cutting blade portion 57, the flange member 73 at the tip of the cover 59 contacts the work 78. Contact. Then, as the cutting by the cutter body 55 progresses, the cover 59 slides on the sliding member 66.
Is pushed toward the base member 65 side against the biasing force of the spring 74 and follows this.

In this manner, the scattering of chips generated by the cutting by the cutting edge portion 57 of the cutter body 55 is prevented by the cover 59 that covers the periphery. On the other hand, when the air is sucked by the suction means 60 at the start of cutting, the air flows in the cover 59 through the tip opening of the cover 59 and is discharged from the suction port 69 to the outside.
The air inside 9 is discharged to the outside together with the chips. At this time, even when the workpiece 78 is brought into contact with the entire circumference of the flange member 73 at the tip, air is sufficiently taken into the cover 59 through the air groove 77 provided in the cover 59 for always communicating the inside and the outside. Will be done. Therefore, the first
The same effect as that of the embodiment can be exhibited.

Next, a chip suction device according to a third embodiment of the present invention will be described with reference to FIG. In FIG. 3, reference numeral 80 indicates a cutter, and reference numeral 81 indicates a chip suction device of the third embodiment attached to the cutter 80. In the third embodiment, the cutter 80 is removably held by the collet chuck 82 on the main body of the cutting machine without passing through the arbor.
The shank portion 83 is held by the main body of the cutting machine, and the main portion 85 has a cutting edge portion 84 formed at its tip.
The portion of the cutter 80 protruding from the collet chuck 82 is an extension portion 86 extending in the opposite direction to the machine body.

The chip suction device 81 has a cylindrical cover 8 supported at one end by the shank portion 83 of the cutter 80.
7 and suction means 88 for sucking air from the inside of the cover 87. The cover 87 is a substantially cylindrical mounting member 89 for fitting the shank portion 83 of the cutter 80 to the inner peripheral portion.
And a bearing 90 for fitting the mounting member 89 to the inner peripheral side, and a substantially cylindrical cylindrical member 91 for fitting the bearing 90 to the inner peripheral side, and the cutter 8
0 has a substantially cylindrical base member 92 that extends to surround 0 and is attached to the cylindrical member 91, and a cylindrical elastic member 93 that is attached to the opposite side of the base member 92 with respect to the cylindrical member 91. are doing. Note that retaining members 94a and 94b for retaining the bearing 90 are fixed to the mounting member 89 and the cylindrical member 91.

The base member 92 is made of steel or the like and is divided into a cylindrical first member 95 and a second member 96. One end side of the first member 95 is attached to the cylindrical member 91 in a state where one end side is closed by the attachment member 89 and the shank portion 83 of the cutter 87, and a suction port 97 for communicating the inside and the outside communicates with the middle portion in the radial direction. Is provided. The second member 96 is fixed to the opposite side of the cylindrical member 91 of the first member 95. Here, an annular engagement groove 98 is formed from the inner peripheral portion of the first member 95 to the inner peripheral portion of the second member 96.

A connecting pipe 99 is attached to the suction port 97 of the first member 95.
A suction means 88 such as a negative pressure source for sucking air is connected. By the suction operation of the suction means 88, the air in the base member 92, that is, the cover 87 is sucked from the suction port 97 and is discharged to the outside through the connecting pipe 99.

The elastic member 93 is coaxial with the cutter, and is of a screw type in which a strip-shaped spring steel material is cylindrical and a part of the spring steel material is overlapped with a slight gap 100 and the position is shifted in the axial direction. The tip end surface on the small diameter side is perpendicular to the axis of the cutter 80, and the portion on the large diameter side is engaged with the engagement groove 98 to restrict movement in the axial direction except expansion and contraction. In addition, in the third embodiment, a slight gap 100 provided in the elastic member 93 serves as an air intake passage that penetrates the inside and outside of the cover 87. According to the chip suction device 81 of the third embodiment having such a configuration, when the cutter 80 abuts the work 101 and starts cutting by the cutting blade portion 84, the elastic member 9 at the tip of the cover 87.
3 contacts the work 101. Then, as the cutting by the cutter 80 progresses, the cover 87 is attached to the elastic member 9
3 elastically deforms in the axial direction to follow.

In this way, the cutting edge portion 8 of the cutter 80 is
The scattering of chips generated by cutting by 4 is prevented by the cover 87 that covers the surroundings. On the other hand, when the air is sucked by the suction means 88 at the start of cutting, the air flows from the tip opening of the cover 87 through the inside of the cover 87 and is discharged from the suction port 97 to the outside. The air inside is discharged outside together with the chips. At this time, even when the work 101 is brought into contact with the entire circumference of the elastic member 93 at the tip, air is sufficiently taken into the cover 87 through the gap 100 provided in the cover 87 that always communicates the inside and the outside. It will be. Therefore, the same effects as those of the first and second embodiments can be exhibited.

The first to third embodiments described above are
Various modifications are possible without being limited to this. For example, the air groove 77 of the second embodiment is formed at the tip end without providing the through hole 51 in the elastic member 34 of the first embodiment, or both the through hole 51 and the air groove 77 are formed, or The through hole 51 of the first embodiment is formed in the vicinity of the tip end portion without providing the air groove 77 in the sliding member 66 of the second embodiment, or both the air groove 77 and the through hole 51 are formed. , The gap 1 in the elastic member 93 of the third embodiment.
00 is not provided, the through hole 51 of the first embodiment is formed in the vicinity of the tip end portion, the air groove 77 of the second embodiment is formed at the tip end portion, or both the through hole 51 and the air groove 77 are formed. It is also possible to combine these with the gap 100.

Further, the through hole 5 of the first elastic member 34.
1, the air groove 77 of the sliding member 66 of the second embodiment and the gap 100 of the expansion / contraction member 93 of the third embodiment may be eliminated, and an annular porous material of a predetermined thickness, so-called sponge, may be attached to the tip portion. . In this case, a large number of holes in the sponge form an air intake passage that communicates the inside and outside of the cover containing the sponge. Of course, it is possible to provide the sponge and selectively combine the configurations of the first to third embodiments.

Further, in the above-mentioned first to third embodiments, the covers 26, 59 and 87 are attached to the cutters 11, 53 and 8 respectively.
Although the description has been made by taking the case of attaching to 0 as an example, it is also possible to attach directly to the machine body. In this case, if it is attached to the non-rotating portion of the machine body, the attachment member 29,
62, 89, bearings 30, 63, 90, cylindrical members 31, 64, 91 and the like are omitted, and base members 33, 65, 9
The diameter of the rotating head 2 is larger than that of the rotating head, and the length can be attached to the machine body as it is so as to be attached to the machine body.

[0031]

As described above in detail, according to the chip suction device of the present invention, even when the cylindrical cover comes into contact with the work at the entire circumference of the tip portion thereof, it is always provided on the cover. Sufficient air is taken into the cover through the air intake passage that communicates the inside and the outside. Therefore, the chips in the cover can be sufficiently removed at all times, and the shape of the cover can be favorably maintained even when the cover is made of a flexible material.

[Brief description of drawings]

FIG. 1 is a sectional view showing a chip suction device according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing a chip suction device according to a second embodiment of the present invention.

FIG. 3 is a sectional view showing a chip suction device according to a third embodiment of the present invention.

[Explanation of symbols]

 11, 53, 80 Cutter 16, 57, 84 Cutting blade part 25, 86 Extending part 26, 59, 87 Cover 27, 60, 88 Suction means 37, 69, 97 Suction port 51 Through hole (air intake path) 77 Air groove (air intake path) 100 gap (air intake path)

Claims (1)

[Claims] 1. A cutting having a machine body and a cutter which is attached to the machine body and is rotationally driven and has a cutting edge portion provided at a tip of an extending portion extending in a direction opposite to the machine body. It is provided on the machine and is supported by the machine body or the cutter at one end side, extends so as to surround the extending portion, and the tip end on the other end side expands and contracts so as to move along the axial direction of the cutter. In a chip suction device having a tubular cover that is free and further provided with a suction port that communicates the inside and the outside, and a suction means that is connected to the suction port and sucks air from the inside of the cover, in the cover, A chip suction device, which is provided with an air intake passage that constantly communicates the inside and outside.